I've read the forums and done everything I can (deleted prefs, repaired permissions, installed Java runtime and rebooted) and nothing will work. Can someone look at the error log I am getting below and help out? I really need Illustrator for work and am going on two days without. Come on Lion, play nice with Adobe!

I was just searching for an answer to a similar problem (illustrator wouldn't open with new Lion operating system).

What I did, and it seemed to work, is I ran the un-installer, and made sure to click the option to delete preferences.

When I reinstalled illustrator, it worked... Fingers crossed it stays that way. Maybe there were some incompatable preferences saved from older CS2 that needed to be removed? I'm no expert, but that's one way to do it without finagling around through back doors and such.

There is a thread somewhere that tells you to find a preferences folder somewhere on your computer that may have been created from an older version of illustrator created that needs to be deleted before you reinstall CS5. Find that thread, and it'll be more specific.

Sorry I can't help more, I resolved the issue several months ago. Hope that helps.